Show simple item record

dc.contributor.authorKarcher, Denis B.
dc.contributor.authorRoth, Florian
dc.contributor.authorCarvalho, Susana
dc.contributor.authorEl-Khaled, Yusuf C.
dc.contributor.authorTilstra, Arjen
dc.contributor.authorKürten, Benjamin
dc.contributor.authorStruck, Ulrich
dc.contributor.authorJones, Burton
dc.contributor.authorWild, Christian
dc.date.accessioned2020-04-05T13:35:50Z
dc.date.available2020-04-05T13:35:50Z
dc.date.issued2020-04-02
dc.date.submitted2019-11-11
dc.identifier.citationKarcher, D. B., Roth, F., Carvalho, S., El-Khaled, Y. C., Tilstra, A., Kürten, B., … Wild, C. (2020). Nitrogen eutrophication particularly promotes turf algae in coral reefs of the central Red Sea. PeerJ, 8, e8737. doi:10.7717/peerj.8737
dc.identifier.issn2167-8359
dc.identifier.doi10.7717/peerj.8737
dc.identifier.urihttp://hdl.handle.net/10754/662428
dc.description.abstractWhile various sources increasingly release nutrients to the Red Sea, knowledge about their effects on benthic coral reef communities is scarce. Here, we provide the first comparative assessment of the response of all major benthic groups (hard and soft corals, turf algae and reef sands—together accounting for 80% of the benthic reef community) to in-situ eutrophication in a central Red Sea coral reef. For 8 weeks, dissolved inorganic nitrogen (DIN) concentrations were experimentally increased 3-fold above environmental background concentrations around natural benthic reef communities using a slow release fertilizer with 15% total nitrogen (N) content. We investigated which major functional groups took up the available N, and how this changed organic carbon (Corg) and N contents using elemental and stable isotope measurements. Findings revealed that hard corals (in their tissue), soft corals and turf algae incorporated fertilizer N as indicated by significant increases in δ$^{15}$N by 8%, 27% and 28%, respectively. Among the investigated groups, Corg content significantly increased in sediments (+24%) and in turf algae (+33%). Altogether, this suggests that among the benthic organisms only turf algae were limited by N availability and thus benefited most from N addition. Thereby, based on higher Corg content, turf algae potentially gained competitive advantage over, for example, hard corals. Local management should, thus, particularly address DIN eutrophication by coastal development and consider the role of turf algae as potential bioindicator for eutrophication.
dc.description.sponsorshipWe are thankful to Marianne Falk for helping in elemental-and isotopic analysis and Nils Rädecker for coral sample processing advice. We were happy to get further support by Pedro Ruiz-Compean (sediment samples), Aislinn Dunne (sediment samples), Sophia Tobler (image editing), Rodrigo Villalobos and João Cúrdia (both field work).
dc.description.sponsorshipThis research was supported by DFG grant Wi 2677/9-1 to Christian Wild, KAUST baseline funding to Burton H. Jones and the KAUST VSRP program to Denis B. Karcher. Susana Carvalho is funded by the Saudi Aramco-KAUST Center for Marine Environmental Observations. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
dc.publisherPeerJ
dc.relation.urlhttps://peerj.com/articles/8737
dc.rightsThis is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
dc.rights.uriCreative Commons Attribution License
dc.titleNitrogen eutrophication particularly promotes turf algae in coral reefs of the central Red Sea
dc.typeArticle
dc.contributor.departmentMarine Science Program
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.identifier.journalPeerJ
dc.eprint.versionPost-print
dc.contributor.institutionMarine Ecology Department, Faculty of Biology and Chemistry, University of Bremen, Bremen, Germany
dc.contributor.institutionBaltic Sea Centre, Stockholm University, Stockholm, Sweden
dc.contributor.institutionTvärminne Zoological Station, Faculty of Biological and Environmental Sciences, University of Helsinki, Helsinki, Finland
dc.contributor.institutionProject Management Jülich, Jülich Research Centre, Rostock, Germany
dc.contributor.institutionMuseum für Naturkunde, Leibniz Institute for Evolution and Biodiversity Science, Berlin, Germany
dc.contributor.institutionDepartment of Earth Sciences, Freie Universität Berlin, Berlin, Germany
dc.identifier.volume8
dc.identifier.pagese8737
kaust.personRoth, Florian
kaust.personCarvalho, Susana
kaust.personKürten, Benjamin
kaust.personJones, Burton
dc.date.accepted2020-02-12
refterms.dateFOA2020-04-05T13:37:39Z


Files in this item

Thumbnail
Name:
peerj-8737-1-submission-1.pdf
Size:
1.051Mb
Format:
PDF
Description:
Published version

This item appears in the following Collection(s)

Show simple item record